SOLUTION: a merchant has coffe with $8 a pound that she wishes to mix with 5 pounds of coffee worth $9 a pound to get a mixture that can be sold for $6 a pound. How many pounds of the $8 cof

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: a merchant has coffe with $8 a pound that she wishes to mix with 5 pounds of coffee worth $9 a pound to get a mixture that can be sold for $6 a pound. How many pounds of the $8 cof      Log On


   

Question 455337: a merchant has coffe with $8 a pound that she wishes to mix with 5 pounds of coffee worth $9 a pound to get a mixture that can be sold for $6 a pound. How many pounds of the $8 coffee should be used?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A merchant has coffee with $8 a pound that she wishes to mix with 5 pounds of coffee worth $9 a pound to get a mixture that can be sold for $6 a pound. How many pounds of the $8 coffee should be used?
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Equation:
value + value = value
8x + 9*5 = 6(x+5)
8x + 45 = 6x+30
2x = -15
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Notice this gives you a negative answer.
That shows you cannot add $8 coffee with $9 coffee
and expect to get $6 coffee.
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Cheers,
Stan H.